TY - JOUR
T1 - Mössbauer, magnetic and microwave absorption characteristics of substituted W-type hexaferrites nanoparticles
AU - Iqbal, Muhammad Javed
AU - Khan, Rafaqat Ali
AU - Mizukami, Shigemi
AU - Miyazaki, Terunobu
N1 - Funding Information:
The project is supported by Higher Education Commission (HEC) of Pakistan .
PY - 2012/7
Y1 - 2012/7
N2 - W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.
AB - W-type hexaferrite nanoparticles of nominal composition BaCo 2-xMn xFe 16-2yZr yNi yO 27 (x = 0-0.5; y = 0-1.0), are synthesized by using the chemical co-precipitation technique. The X-ray diffraction (XRD) data conform to the formation of single phase. Mössbauer analysis reveals that extrinsic substitution of metal ions (Mn x and Zr y-Ni y) takes place at 2d, f IV, 2b, and 12k sub-lattices. Doped metal substitution up to ionic contents of x = 0.3 and y = 0.6, results in enhancement of the saturation magnetization M s and remanent magnetization M r while these substitutions lower the coercivity H c. The optimum values of the above mentioned three parameters, measured at room temperature, using a vibrating sample magnetometer (VSM), are 79.7 emu g -1, 36.0 emu g -1 and 1012 Oe, respectively. Microwave absorption characteristics calculated from complex permeability and complex permittivity data retrieved by a vector network analyzer (VNA) increase as the doped metal ions content increases.
KW - A. Powders: chemical preparation
KW - C. Magnetic properties
KW - D. Ferrites
KW - Microwave absorption
KW - Mössbauer spectroscopy
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U2 - 10.1016/j.ceramint.2012.01.067
DO - 10.1016/j.ceramint.2012.01.067
M3 - Article
AN - SCOPUS:84859773028
SN - 0272-8842
VL - 38
SP - 4097
EP - 4103
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -